Yeah, that's Momo, i remember now, it was in a chapter where they get sprayed by a young-enator, skunk or something like that.

Btw, for me it's the opposite, i really like To Love Ru, it started slow but then it picks up great as a fanservice anime, such as DxD, at least , but i dropped DxD, i have the last 3 chapters of the 2nd season and i haven't watched them yet, they have been sitting there for like 5 months now